Teacher Moriguchi is a single mother whose little daughter Manami always waits at the school infirmary until her mom's work ends. But one day, she can't be found anywhere, so Moriguchi and a few students search the whole area. They then find her drowned in the school's swimming pool. The police determine it as an accident. But Moriguchi is convinced that it was two students from her class who killed her.
'Kokuhaku' is a dark and dramatic story circling around revenge. The film starts off with Moriguchi Yuko (played by Matsu Takako), a teacher telling her students about the death of her own daughter. She reveals that the murderers are two of her students: Shuuya (played by Nishii Yukito) and Naoki (played by Fujiwara Kaoru). Throughout the film, the audience gets to discover the true side of all those involved through confessions told by each different character. The ending is the best part and shows how all the events that took place after Moriguchi's speech to her class ties into her revenge against the boys who killed her young daughter. It's shocking and it's dark, but it fits the whole theme of the movie completely. Overall, this film was a masterpiece. The cast was impressive and the storyline was twisted and thrilling. One of the best movies of 2010!